Early Films:
* The Old Corral (1936)
* Under the Texas Stars (1936)
* Under Western Skies (1938)
* The Cowboy and the Lady (1938)
Republic Pictures Era (1939-1952):
* The Phantom Creeps (1939)
* The Cowboy Quarterback (1940)
* The Trail of the Vigilantes (1940)
* Dark Command (1940)
* The Durango Kid (1940)
* The Range Rider (1940)
* The Light of Western Stars (1940)
* The Rider of the Black Horse (1941)
* Jesse James Rides Again (1941)
* The Black Bandit (1942)
* Trail of the Vigilantes (1940)
* Don't Fence Me In (1944) (with Gene Autry)
* The Woman in the Window (1944) (with Edward G. Robinson)
* The Golden Stallion (1949)
* Son of Paleface (1952)
Later Films:
* The Last Outpost (1951)
* The Lawless Breed (1953)
* The Yellow Tomahawk (1954)
* The Red Stallion in the Rockies (1949)
* The Great Sioux Uprising (1953)
Note: These are just some of the most popular and well-known movies Roy Rogers starred in. There are many other films that are not listed here.
If you want to find a complete list of all of Roy Rogers' films, I suggest searching online databases like IMDb or the TCM website. You can also find information about his films in books and articles about his career.